FRE-600: Implement Phase 1 WebSocket + Yjs CRDT foundation

- Create TypeScript and Vite configuration for SolidJS
- Implement Yjs document structure for screenplay collaboration
- Build WebSocket connection manager with exponential backoff reconnection
- Create CRDT document manager with undo/redo support
- Set up WebSocket sync server with JWT authentication
- Add SolidJS reactive bindings for Yjs shared types
- Build collaborative editor component
- Write unit tests for CRDT operations
- Document implementation in analysis/fre600_websocket_foundation.md

Architecture: Yjs chosen over Automerge for better ecosystem and
Tauri compatibility. WebSocket for sync, WebRTC for video.

Co-Authored-By: Paperclip <noreply@paperclip.ing>

package.json

@@ -0,0 +1,47 @@
+{
+  "name": "frenocorp-collaboration",
+  "version": "0.1.0",
+  "description": "FrenoCorp real-time collaboration layer with Yjs and WebSocket",
+  "type": "module",
+  "scripts": {
+    "dev": "vite",
+    "build": "tsc && vite build",
+    "preview": "vite preview",
+    "test": "vitest",
+    "test:coverage": "vitest run --coverage",
+    "server:dev": "tsx watch server/websocket/index.ts",
+    "server:build": "tsc -p tsconfig.server.json",
+    "lint": "eslint src/ server/",
+    "lint:fix": "eslint src/ server/ --fix"
+  },
+  "dependencies": {
+    "solid-js": "^1.8.14",
+    "yjs": "^13.6.12",
+    "y-websocket": "^1.5.0",
+    "ws": "^8.16.0"
+  },
+  "devDependencies": {
+    "@types/ws": "^8.5.10",
+    "@typescript-eslint/eslint-plugin": "^7.0.2",
+    "@typescript-eslint/parser": "^7.0.2",
+    "eslint": "^8.56.0",
+    "eslint-plugin-solid": "^0.13.2",
+    "typescript": "^5.3.3",
+    "vite": "^5.1.4",
+    "vite-plugin-solid": "^2.8.2",
+    "vitest": "^1.3.1",
+    "tsx": "^4.7.1"
+  },
+  "engines": {
+    "node": ">=18.0.0"
+  },
+  "keywords": [
+    "yjs",
+    "crdt",
+    "websocket",
+    "collaboration",
+    "solidjs",
+    "tauri"
+  ],
+  "license": "MIT"
+}